CN111816818A - Battery pack, tool system and charging system - Google Patents
Battery pack, tool system and charging system Download PDFInfo
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- CN111816818A CN111816818A CN202010771291.XA CN202010771291A CN111816818A CN 111816818 A CN111816818 A CN 111816818A CN 202010771291 A CN202010771291 A CN 202010771291A CN 111816818 A CN111816818 A CN 111816818A
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- cell module
- battery cell
- assembly
- battery pack
- battery
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- 238000006243 chemical reaction Methods 0.000 claims abstract description 72
- 230000008878 coupling Effects 0.000 claims description 10
- 238000010168 coupling process Methods 0.000 claims description 10
- 238000005859 coupling reaction Methods 0.000 claims description 10
- 210000001503 joint Anatomy 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 5
- 230000005540 biological transmission Effects 0.000 description 3
- 238000003780 insertion Methods 0.000 description 2
- 230000037431 insertion Effects 0.000 description 2
- MTLMVEWEYZFYTH-UHFFFAOYSA-N 1,3,5-trichloro-2-phenylbenzene Chemical compound ClC1=CC(Cl)=CC(Cl)=C1C1=CC=CC=C1 MTLMVEWEYZFYTH-UHFFFAOYSA-N 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/4207—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells for several batteries or cells simultaneously or sequentially
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0013—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries acting upon several batteries simultaneously or sequentially
- H02J7/0024—Parallel/serial switching of connection of batteries to charge or load circuit
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0042—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries characterised by the mechanical construction
- H02J7/0045—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries characterised by the mechanical construction concerning the insertion or the connection of the batteries
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Battery Mounting, Suspending (AREA)
Abstract
The invention provides a battery pack, a tool system and a charging system. The battery pack comprises a shell, a battery pack accommodated in the shell, a terminal assembly electrically connected with the battery pack, and a conversion assembly electrically connected with the battery pack, wherein the conversion assembly is arranged in a sliding manner, and when the conversion assembly is located at a first position, the battery pack outputs a first voltage value; when the conversion assembly slides to the second position, the battery pack outputs a second voltage value; when the conversion assembly slides to a third position, the battery pack outputs a third voltage value; the first voltage value is smaller than a second voltage value, and the second voltage value is smaller than a third voltage value. Compared with the prior art, the battery pack realizes the series-parallel state switching of each battery cell module in the battery pack by controlling the sliding position of the conversion assembly, so that the output voltage of the battery pack is changed, and the adaptability of a tool system with the battery pack is improved.
Description
Technical Field
The invention relates to the technical field of battery packs, in particular to a battery pack, a tool system and a charging system.
Background
In the garden machinery, power tool industry, tools with different voltage ratings usually need to be powered by battery packs with different voltage ratings, which results in an increase in the variety of battery packs and an increase in cost.
Accordingly, there is a need for an improved battery pack, tool system and charging system to solve the above problems.
Disclosure of Invention
The invention aims to provide a battery pack, a tool system and a charging system which can realize quick switching and three-voltage output.
In order to achieve the above object, the present invention provides a battery pack, including a housing, a battery pack accommodated in the housing, and a terminal assembly electrically connected to the battery pack, where the battery pack includes at least a first battery cell module, a second battery cell module, a third battery cell module, and a fourth battery cell module, the battery pack further includes a conversion assembly electrically connected to the battery cell modules, the conversion assembly is slidably disposed, and when the conversion assembly is located at a first position, the first battery cell module, the second battery cell module, the third battery cell module, and the fourth battery cell module are connected in parallel, and the battery pack outputs a first voltage value; when the conversion assembly slides to a second position, the anode of the first battery cell module is connected with the anode of the second battery cell module, the cathode of the first battery cell module is connected with the cathode of the second battery cell module and then connected with the anode of the third battery cell module and the anode of the fourth battery cell module, the cathode of the third battery cell module is connected with the cathode of the fourth battery cell module, and the battery pack outputs a second voltage value; when the conversion assembly slides to a third position, the first battery cell module, the second battery cell module, the third battery cell module and the fourth battery cell module are connected in series, and the battery pack outputs a third voltage value; the first voltage value is smaller than a second voltage value, and the second voltage value is smaller than a third voltage value.
As a further improvement of the present invention, the switching assembly includes a first connecting assembly, a second connecting assembly and a third connecting assembly which correspond to the terminal assembly and are arranged at intervals, when the switching assembly is located at the first position, the terminal assembly is electrically connected to the first connecting assembly, when the switching assembly slides to the second position, the terminal assembly is electrically connected to the second connecting assembly, and when the switching assembly slides to the third position, the terminal assembly is electrically connected to the third connecting assembly.
As a further improvement of the present invention, the first connection assembly includes a first positive connection tab and a first negative connection tab, and the first positive connection tab has four positive pins to be connected to the positive electrodes of the first cell module, the second cell module, the third cell module, and the fourth cell module, respectively; the first negative pole connecting piece is provided with four negative pole pins to be connected with the negative poles of the first battery cell module, the second battery cell module, the third battery cell module and the fourth battery cell module respectively.
As a further improvement of the present invention, the second connection assembly includes a second positive connection piece connecting the positive electrode of the first cell module and the positive electrode of the second cell module, a fourth connection piece connecting the positive electrode of the third cell module, the positive electrode of the fourth cell module, the negative electrode of the first cell module, and the negative electrode of the second cell module, respectively, and a second negative connection piece connecting the negative electrode of the third cell module and the negative electrode of the fourth cell module.
As a further improvement of the present invention, the third connection assembly includes a first connection piece connecting the positive electrode of the second cell module and the negative electrode of the first cell module, a second connection piece connecting the positive electrode of the third cell module and the negative electrode of the second cell module, and a third connection piece connecting the positive electrode of the fourth cell module and the negative electrode of the third cell module, so as to realize the series connection of the first cell module, the second cell module, the third cell module, and the fourth cell module.
As a further improvement of the present invention, the conversion assembly includes an electrode tab seat and an inner tab seat, the terminal assembly and the inner tab seat are both accommodated in the electrode tab seat, and the first connecting assembly, the second connecting assembly and the third connecting assembly are all integrally formed in the inner tab seat.
As a further improvement of the present invention, the inner insert seat is slidably disposed, and the first connecting assembly, the second connecting assembly and the third connecting assembly are disposed at intervals along a sliding direction of the inner insert seat.
As a further improvement of the present invention, the switching assembly further includes a pushing portion for pushing the inner blade holder to slide, the third connecting assembly is closer to the pushing portion than the second connecting assembly, and the first connecting assembly is further from the pushing portion than the second connecting assembly.
As a further improvement of the present invention, the inner blade holder includes a base and a spring structure abutting against the base, the first connecting assembly, the second connecting assembly and the third connecting assembly are integrally formed with the base, and the spring structure is compressed or released when the inner blade holder slides, so that the terminal assembly is switchably connected among the first connecting assembly, the second connecting assembly and the third connecting assembly.
As a further improvement of the invention, the electrode insert seat is provided with an accommodating cavity, the terminal assembly and the inner insert seat are accommodated in the accommodating cavity, the base body is provided with a slide rail protruding towards one side of the electrode insert seat, the electrode insert seat is correspondingly provided with a through groove, and the slide rail is accommodated in the through groove so as to guide the inner insert seat to slide in the electrode insert seat.
In order to achieve the above object, the present invention further provides a battery pack, including a housing, a battery pack accommodated in the housing, and a terminal assembly electrically connected to the battery pack, where the battery pack includes at least a first battery cell module, a second battery cell module, a third battery cell module, and a fourth battery cell module, the battery pack further includes a converting assembly electrically connected to the battery cell modules, the converting assembly is slidably disposed, and when the converting assembly is located at a first position, the first battery cell module, the second battery cell module, the third battery cell module, and the fourth battery cell module are connected in parallel, and the battery pack outputs a first voltage value; when the conversion assembly slides to a second position, the positive electrode of the first battery cell module is connected with the positive electrode of the second battery cell module, the negative electrode of the first battery cell module is connected with the positive electrode of the fourth battery cell module, the negative electrode of the second battery cell module is connected with the positive electrode of the third battery cell module, the negative electrode of the third battery cell module is connected with the negative electrode of the fourth battery cell module, and the battery pack outputs a second voltage value; when the conversion assembly slides to a third position, the first battery cell module, the second battery cell module, the third battery cell module and the fourth battery cell module are connected in series, and the battery pack outputs a third voltage value; the first voltage value is smaller than a second voltage value, and the second voltage value is smaller than a third voltage value.
As a further improvement of the present invention, the switching assembly includes a first connecting assembly, a second connecting assembly and a third connecting assembly which correspond to the terminal assembly and are arranged at intervals, when the switching assembly is located at the first position, the terminal assembly is electrically connected to the first connecting assembly, when the switching assembly slides to the second position, the terminal assembly is electrically connected to the second connecting assembly, and when the switching assembly slides to the third position, the terminal assembly is electrically connected to the third connecting assembly.
As a further improvement of the present invention, the first connection assembly includes a first positive connection tab and a first negative connection tab, and the first positive connection tab has four positive pins to be connected to the positive electrodes of the first cell module, the second cell module, the third cell module, and the fourth cell module, respectively; the first negative pole connecting piece is provided with four negative pole pins to be connected with the negative poles of the first battery cell module, the second battery cell module, the third battery cell module and the fourth battery cell module respectively.
As a further improvement of the present invention, the second connection assembly includes a second positive connection piece connecting the positive electrode of the first cell module and the positive electrode of the second cell module, a fifth connection piece connecting the positive electrode of the third cell module and the negative electrode of the second cell module, a sixth connection piece connecting the positive electrode of the fourth cell module and the negative electrode of the first cell module, and a second negative connection piece connecting the negative electrode of the third cell module and the negative electrode of the fourth cell module.
As a further improvement of the present invention, the third connection assembly includes a first connection piece connecting the positive electrode of the second cell module and the negative electrode of the first cell module, a second connection piece connecting the positive electrode of the third cell module and the negative electrode of the second cell module, and a third connection piece connecting the positive electrode of the fourth cell module and the negative electrode of the third cell module, so as to realize the series connection of the first cell module, the second cell module, the third cell module, and the fourth cell module.
As a further improvement of the present invention, the conversion assembly includes an electrode tab seat and an inner tab seat, the terminal assembly and the inner tab seat are both accommodated in the electrode tab seat, and the first connecting assembly, the second connecting assembly and the third connecting assembly are all integrally formed in the inner tab seat.
As a further improvement of the present invention, the inner insert seat is slidably disposed, and the first connecting assembly, the second connecting assembly and the third connecting assembly are disposed at intervals along a sliding direction of the inner insert seat.
As a further improvement of the present invention, the switching assembly further includes a pushing portion for pushing the inner blade holder to slide, the third connecting assembly is closer to the pushing portion than the second connecting assembly, and the first connecting assembly is further from the pushing portion than the second connecting assembly.
As a further improvement of the present invention, the inner blade holder includes a base and a spring structure abutting against the base, the first connecting assembly, the second connecting assembly and the third connecting assembly are integrally formed with the base, and the spring structure is compressed or released when the inner blade holder slides, so that the terminal assembly is switchably connected among the first connecting assembly, the second connecting assembly and the third connecting assembly.
As a further improvement of the invention, the electrode insert seat is provided with an accommodating cavity, the terminal assembly and the inner insert seat are accommodated in the accommodating cavity, the base body is provided with a slide rail protruding towards one side of the electrode insert seat, the electrode insert seat is correspondingly provided with a through groove, and the slide rail is accommodated in the through groove so as to guide the inner insert seat to slide in the electrode insert seat.
To achieve the above object, the present invention provides a tool system comprising:
the battery pack comprises a shell, a battery pack accommodated in the shell, and a terminal assembly and a conversion assembly which are electrically connected with the battery pack, wherein the conversion assembly is arranged in a sliding manner;
a first power tool operable at a first rated voltage, the first power tool provided with a first external blade mount;
a second power tool operable at a second voltage rating, the second power tool provided with a second external blade mount;
a third power tool operable at a third rated voltage, the third power tool provided with a third external blade mount;
when the battery pack is connected with a first external inserting piece seat of a first electric tool, the conversion assembly is located at a first position, and the battery pack outputs a first voltage value;
when the battery pack is connected with a second external inserting piece seat of a second electric tool, the conversion assembly slides to a second position, and the battery pack outputs a second voltage value;
when the battery pack is connected with a third external inserting piece seat of a third electric tool, the conversion assembly slides to a third position, and the battery pack outputs a third voltage value; the first voltage value is smaller than a second voltage value, and the second voltage value is smaller than a third voltage value.
As a further improvement of the present invention, the first voltage value is "n" V, the second voltage value is "2 n" V, and the third voltage value is "4 n" V.
As a further improvement of the invention, the conversion assembly comprises an electrode insert seat and an inner insert seat, the terminal assembly and the inner insert seat are both accommodated in the electrode insert seat, and the inner insert seat is arranged in a sliding manner.
As a further improvement of the present invention, the electrode tab seat is provided with an accommodating cavity, the terminal assembly and the internal tab seat are both accommodated in the accommodating cavity, the internal tab seat is provided with a slide rail protruding towards one side of the electrode tab seat, the electrode tab seat is correspondingly provided with a through groove, and the slide rail is accommodated in the through groove so as to guide the internal tab seat to slide in the electrode tab seat.
As a further improvement of the invention, the conversion assembly further comprises a push rod for pushing the inner insert seat to slide, and the push rod and the outer insert seat are integrally formed.
As a further improvement of the present invention, the length of the push rod on the first external patch board is smaller than that of the push rod on the second external patch board, and the length of the push rod on the second external patch board is smaller than that of the push rod on the third external patch board.
In order to achieve the above object, the present invention also provides a charging system, including:
the battery pack comprises a shell, a battery pack accommodated in the shell, a terminal assembly and a conversion assembly, wherein the terminal assembly and the conversion assembly are electrically connected with the battery pack, the battery pack at least comprises a first battery cell module, a second battery cell module, a third battery cell module and a fourth battery cell module, the conversion assembly is arranged in a sliding mode, and when the conversion assembly is at a first position, the battery pack outputs a first voltage value; when the conversion assembly slides to a second position, the battery pack outputs a second voltage value; when the conversion assembly slides to a third position, the battery pack outputs a third voltage value; the first voltage value is smaller than a second voltage value, and the second voltage value is smaller than a third voltage value;
the charger is used for charging the battery pack, when the charger is in butt joint with the battery pack for charging, the conversion assembly is located at a first position, and the first battery cell module, the second battery cell module, the third battery cell module and the fourth battery cell module are connected in parallel.
The invention has the beneficial effects that: according to the battery pack, the sliding position of the conversion assembly is controlled, so that the series-parallel connection state switching of each battery cell module in the battery pack is realized, the output voltage of the battery pack is changed, and the adaptability of a tool system with the battery pack is improved.
Drawings
Fig. 1 is a perspective view of a tool system of the present invention.
Fig. 2 is an exploded view of the tool system shown in fig. 1.
Fig. 3 is an exploded view of the conversion assembly of fig. 2.
Fig. 4 is a partially assembled perspective view of the tool system shown in fig. 1.
Fig. 5 is a schematic structural view of the inner wafer carrier of fig. 3.
Fig. 6 is another perspective view of the inner wafer carrier of fig. 5.
FIG. 7 is a schematic view of the inner wafer carrier of FIG. 5 with the substrate removed.
Fig. 8 is a schematic structural view of the terminal assembly of fig. 3.
Fig. 9 is a schematic structural view of the electrode card holder of fig. 3.
Fig. 10 is an exploded perspective view of the first outer insert holder of fig. 3.
Fig. 11 is a schematic view showing a structure in which the terminal assembly is coupled to the first coupling assembly after the first external blade holder shown in fig. 10 is inserted.
Fig. 12 is a schematic view showing a state of circuit connection in the battery pack after the first external blade holder shown in fig. 10 is inserted.
Fig. 13 is a circuit diagram illustrating a connection of the battery pack after the first external tab holder shown in fig. 10 is inserted.
Fig. 14 is an exploded perspective view of the second external patch bay.
Fig. 15 is a schematic view of the terminal assembly shown in fig. 14 when the second outer blade holder is inserted and the terminal assembly is coupled to the second connecting assembly.
Fig. 16 is a schematic view showing the connection state of the circuit in the battery pack after the second external blade holder shown in fig. 14 is inserted.
Fig. 17 is a circuit diagram illustrating the connection of the battery pack after the second external blade mount shown in fig. 14 is inserted.
Fig. 18 is another embodiment of the second connection assembly of fig. 7.
Fig. 19 is a schematic view of the terminal assembly shown in fig. 14, after insertion of the second outer blade housing, connected to the second connection assembly shown in fig. 18.
Fig. 20 is a schematic diagram of the state of circuit connection within the battery pack corresponding to fig. 19.
Fig. 21 is a connection circuit diagram of the battery pack corresponding to fig. 19.
Fig. 22 is an exploded perspective view of a third outer blade mount.
Fig. 23 is a schematic view of the terminal assembly shown in fig. 22 after insertion of the third outer blade holder and when the terminal assembly is connected to the third connection assembly.
Fig. 24 is a schematic view showing a state of circuit connection in the battery pack after the third external blade mount shown in fig. 22 is inserted.
Fig. 25 is a circuit diagram showing the connection of the battery pack after the third external patch bay shown in fig. 22 is inserted.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in detail with reference to the accompanying drawings and specific embodiments.
As shown in fig. 1 to 3, the present invention discloses a battery pack including a case 10 and a battery pack 20 accommodated in the case 10, a PCB board 30, and a conversion assembly 40 and a terminal assembly 42 electrically connected to the battery pack 20. The battery pack 20 includes a plurality of cell modules, and the converting assembly 40 is electrically connected to the cell modules. The switching assembly 40 includes an electrode tab holder 41 and an inner tab holder 43 disposed opposite to the terminal assembly 42, and the terminal assembly 42 is preferably a female terminal assembly, but should not be limited thereto. The battery pack of the present invention is used on a tool system that also includes an external patch receptacle 50 that can be inserted into the battery pack to interface with the female terminal assembly 42 of the battery pack.
As shown in fig. 4 and 8 in combination with fig. 2 and 3, the electrode insert seat 41 has a receiving cavity 411, the female terminal assembly 42 and the inner insert seat 43 are both received in the receiving cavity 411, and the female terminal assembly 42 is electrically connected to the electrode of the cell module through the PCB 30. Specifically, the female terminal assembly 42 includes a positive terminal 421 and a negative terminal 422, wherein the positive terminal 421 includes a first positive terminal 423 and a second positive terminal 424, the first positive terminal 423 is used as a total positive output terminal to be butted with the external tab holder 50, and the second positive terminals 424 are respectively electrically connected with the positive electrodes of the corresponding cell modules; the negative terminal 422 also includes a first negative terminal 425 and a second negative terminal 426, the first negative terminal 425 is used as a total negative output terminal to be butted with the external patch socket 50, and the second negative terminal 426 is electrically connected to the negative electrodes of the corresponding battery cell modules, so as to output the voltage in the battery pack.
In this embodiment, the first positive terminal 423 and the first negative terminal 425 are disposed near one end of the electrode tab holder 41, the second positive terminal 424 and the second negative terminal 426 are substantially located at the middle position of the electrode tab holder 41, and the second positive terminal 424 and the second negative terminal 426 are arranged left and right on a straight line. The battery pack 20 at least includes four battery cell modules, namely a first battery cell module 21, a second battery cell module 22, a third battery cell module 23 and a fourth battery cell module 24; correspondingly, the first positive terminal 423 is connected with the positive electrode of the first cell module 21, and the first negative terminal 425 is connected with the negative electrode of the fourth cell module 24; the number of the second positive terminals 424 and the number of the second negative terminals 426 are 4, and the terminals are arranged from right to left in a + + + - - - -manner to be respectively connected with four cell modules.
All be equipped with a plurality of electric cores in every electric core module, these a plurality of electric cores can establish ties each other, also can connect in parallel each other, do not do too much description here. It is assumed that the rated output voltage of each cell module is "n" V, i.e., the rated output voltage u of the first cell module 211Rated output voltage u of second cell module 222Rated output voltage u of third cell module 233Rated output voltage u of fourth cell module 244＝“n”V。
The conversion assembly 40 is arranged in a sliding manner, when the conversion assembly 40 is located at a first position, the first cell module 21, the second cell module 22, the third cell module 23, and the fourth cell module 24 are connected in parallel, and the battery pack outputs a first voltage value; when the conversion assembly 40 slides to the second position, the positive electrode of the first cell module 21 is connected to the positive electrode of the second cell module 22, the negative electrode of the first cell module 21 is connected to the negative electrode of the second cell module 22 and then connected to the positive electrode of the third cell module 23 and the positive electrode of the fourth cell module 24, the negative electrode of the third cell module 23 is connected to the negative electrode of the fourth cell module 24, and the battery pack outputs a second voltage value; when the conversion assembly 40 slides to the third position, the first cell module 21, the second cell module 22, the third cell module 23, and the fourth cell module 24 are connected in series, and the battery pack outputs a third voltage value. The first voltage value is smaller than a second voltage value, and the second voltage value is smaller than a third voltage value.
As shown in fig. 5 to 8 in combination with fig. 3 and 4, the inner blade holder 43 is provided with a first connecting assembly 44, a second connecting assembly 45 and a third connecting assembly 46 which are spaced apart from and correspond to the female terminal assembly 42, the inner blade holder 43 is slidably disposed, when the inner blade holder is located at a first position, the female terminal assembly 42 is electrically connected to the first connecting assembly 44, when the inner blade holder is slid to a second position, the female terminal assembly 42 is electrically connected to the second connecting assembly 45, and when the inner blade holder is slid to a third position, the female terminal assembly 42 is electrically connected to the third connecting assembly 46.
The first connecting assembly 44, the second connecting assembly 45 and the third connecting assembly 46 are arranged at intervals along the sliding direction (up-down direction) of the internal patch board 43, when the female terminal assembly 42 is electrically connected with the first connecting assembly 44, the first cell module 21, the second cell module 22, the third cell module 23 and the fourth cell module 24 are connected in parallel, and at this time, a first voltage value output by the battery pack is "n" V; when the female terminal assembly 42 is electrically connected to the second connection assembly 45, the first cell module 21, the second cell module 22, the third cell module 23, and the fourth cell module 24 are connected in series and parallel (i.e., connected in series and then connected in parallel or connected in parallel and then connected in series), and a second voltage value output by the battery pack is "2 n" V; when the female terminal assembly 42 is electrically connected to the third connection assembly 46, the first cell module 21, the second cell module 22, the third cell module 23, and the fourth cell module 24 are connected in series, and a third voltage value output by the battery pack is "4 n" V.
Specifically, the first connection assembly 44 includes a first positive connection piece 441 and a first negative connection piece 442, where the first positive connection piece 441 has four positive pins respectively connected to the positive electrodes of the first cell module 21, the second cell module 22, the third cell module 23, and the fourth cell module 24; the first negative electrode connecting piece 442 has four negative electrode pins, and is respectively connected to the negative electrodes of the first cell module 21, the second cell module 22, the third cell module 23, and the fourth cell module 24. So design, first electric core module 21, second electric core module 22, third electric core module 23 and fourth electric core module 24 are parallel connection each other, and first voltage value "n" V equals the rated output voltage of each electric core module this moment.
Second coupling assembling 45 includes the second positive connection piece 451 that links to each other the positive pole of first electric core module 21 and the positive pole of second electric core module 22, the fourth connection piece 452 that links to each other the positive pole of third electric core module 23, the positive pole of fourth electric core module 24, the negative pole of first electric core module 21 and the negative pole of second electric core module 22 respectively, and the second negative pole connection piece 453 that links to each other the negative pole of third electric core module 23 and the negative pole of fourth electric core module 24. So design, can form first electric core module 21 and second electric core module 22 parallelly connected, third electric core module 23 and fourth electric core module 24 parallelly connected, the connected mode of establishing ties again afterwards (being earlier and then cluster), second voltage value "2 n" V equals the rated output voltage sum of two electric core modules this moment.
Third coupling assembling 46 includes the first connection piece 461 that links to each other the positive pole of second electric core module 22 and the negative pole of first electric core module 21, the second connecting piece 462 that links to each other the positive pole of third electric core module 23 and the negative pole of second electric core module 22 and the third connection piece 463 that links to each other the positive pole of fourth electric core module 24 and the negative pole of third electric core module 23, realize with this first electric core module 21, second electric core module 22, the series connection of third electric core module 23 and fourth electric core module 24, third voltage value "4 n" V equals the rated output voltage sum of four electric core modules this moment.
The inner insert seat 43 includes a base 431 and a spring structure 432 abutting against the base 431, and the first connecting assembly 44, the second connecting assembly 45, and the third connecting assembly 46 are integrally formed with the base 431. The base body 431 is provided with a rib 433 and sliding grooves 434 located on two sides of the rib 433, the first connecting assembly 44, the second connecting assembly 45 and the third connecting assembly 46 are molded and exposed on the rib 433, and two contact pieces 427 of each of the second positive terminal 424 and the second negative terminal 426 are contained in the sliding grooves 434 and clamp the rib 433, so that when the inner insert seat 43 slides, the second positive terminal 424 and the second negative terminal 426 can be ensured to always slide in the sliding grooves 434 and keep a state of clamping and abutting against the rib 433.
As shown in fig. 5, 6 and 9 in combination with fig. 4, the base 431 is provided with an accommodating portion 435 extending outward, the inner sidewall of the electrode wafer holder 41 is provided with a positioning post 412, one end of the spring structure 432 is sleeved on the outer periphery of the positioning post 412, and the other end of the spring structure is abutted against the inner wall of the accommodating portion 435. As the inner blade nest 43 slides, the spring structure 432 is compressed or released so that the female terminal assembly 42 is switchably connected between the first, second and third connection assemblies 44, 45, 46.
The base 431 is further provided with a slide rail 436 protruding towards one side of the electrode card holder 41, a through groove 413 is correspondingly formed in the electrode card holder 41, and the slide rail 436 is accommodated in the through groove 413 so as to guide the inner card holder 43 to slide along the through groove 413 in the electrode card holder 41. The number and the arrangement positions of the sliding rails 436 and the through slots 413 may be determined according to practical situations, and are not limited herein. A pushing part 437 protrudes outwards from one side of the base 431 away from the receiving part 435, and the sliding rail 436 is disposed on the pushing part 437. The pushing portion 437 can be used to push the inner wafer seat 43 to slide, the third connecting component 46 is closer to the pushing portion 437 than the second connecting component 45, and the first connecting component 44 is farther from the pushing portion 437 than the second connecting component 45.
The switching assembly 40 further includes a push rod for further pushing the inner insert seat 43 to slide, the third connecting assembly 46 is closer to the push rod than the second connecting assembly 45, and the first connecting assembly 44 is further away from the push rod than the second connecting assembly 45. The push rod may be integrally formed with the base 431 or integrally formed with the outer wafer seat 50, so that when the outer wafer seat 50 is inserted, the push rod can be used to force the inner wafer seat 43 to slide, and then the female terminal assembly 42 is electrically connected to the first connecting assembly 44, the second connecting assembly 45 or the third connecting assembly 46.
When the push rod is formed on the external insert seat 50, the external insert seat 50 may be set to three separate external insert seats according to the length difference of the push rod, or the push rods with different lengths may be set on one external insert seat, and different configurations may be realized by switching the push rods with different lengths. For convenience of description, a tool system is defined to comprise a first electric tool, a second electric tool and a third electric tool, wherein the first electric tool is provided with a first external insert seat and can operate at a first rated voltage; the second electric tool is provided with a second external inserting piece seat which can operate under a second rated voltage; the third power tool is provided with a third external blade mount capable of operating at a third voltage rating. The principle of use of the tool system of the present invention will be described in detail below using these three separate external blade mounts.
The external insert seat 50 includes a first external insert seat 51, a second external insert seat 52 and a third external insert seat 53, and the length of the push rod 47 on the second external insert seat 52 is smaller than that of the push rod 47 on the first external insert seat 51, and the length of the push rod 47 on the second external insert seat 52 is smaller than that of the push rod 47' on the third external insert seat 53.
As shown in fig. 8 and 10, the first external patch holder 51 includes a body 511 and a male terminal 512 plugged into the body 511, and a length of the push rod of the body 511 is zero. The male terminal 512 comprises a positive male terminal 513 and a negative male terminal 514, the positive male terminal 513 is used for being butted with the first positive terminal 423, and the negative male terminal 514 is used for being butted with the first negative terminal 425, so that the battery pack female terminal assembly 42 is electrically conducted with the first external patch holder 51 male terminal 512, and the transmission of current and voltage is realized.
As shown in fig. 11 to 13, when the first external tab holder 51 is inserted, the positive male terminal 513 is abutted against the first positive terminal 423, the negative male terminal 514 is abutted against the first negative terminal 425, the internal tab holder 43 is located at the first position (i.e. at the bottom position of the electrode tab holder 41), the female terminal assembly 42 is electrically connected to the first connecting assembly 44, and the first cell module 21, the second cell module 22, the third cell module 23, and the fourth cell module 24 are connected in parallel. According to the principle of 'parallel voltage division and series current division', the first voltage value output by the battery pack is equal to the rated output voltage of each battery cell module, namely, U is equal to U1＝u2＝u3＝u4＝“n”V。
As shown in fig. 14, the second external patch bay 52 includes a main body 521 and a male terminal 522 plugged into the main body 521, the male terminal 522 includes a positive male terminal 523 and a negative male terminal 524, the positive male terminal 523 is used for being abutted with the first positive terminal 423, and the negative male terminal 524 is used for being abutted with the first negative terminal 425, so as to realize electrical conduction between the battery pack female terminal assembly 42 and the male terminal 522 of the second external patch bay 52, and realize transmission of current and voltage.
Unlike the first outer blade holder 51 shown in fig. 10: the push rod 47 is provided on the body portion 521 of the second outer blade holder 52.
As shown in FIGS. 15-17, when the second external blade holder 52 is inserted, the push rod 47 pushes the push portion 437 on the internal blade holder 43 to force the internal blade holder 43 to slide upward, the spring structure 432 is compressed until the male positive terminal 523 abuts against the first positive terminal 423, the male negative terminal 524 abuts against the first negative terminal 425, and the internal blade holder 43 slides to the second position (i.e. the middle position of the electrode blade holder 41), and the female terminal assembly 42With second coupling assembling 45 electric connection, realized that first electric core module 21 and second electric core module 22 are parallelly connected, third electric core module 23 and fourth electric core module 24 are parallelly connected, the connected mode of establishing ties each other again (be earlier and then cluster). According to the principle of 'parallel voltage division and series current division', the second voltage value output by the battery pack is equal to the sum of rated output voltages of the two battery cell modules, namely U-U1+u2＝u3+u4＝“2n”V。
As shown in fig. 18, another embodiment of the second connecting assembly 45. In this embodiment, the second connection assembly 45 ' includes a second positive connection piece 451 ' connecting the positive electrode of the first cell module 21 and the positive electrode of the second cell module 22, a fifth connection piece 452 ' connecting the positive electrode of the third cell module 23 and the negative electrode of the second cell module 22, a sixth connection piece 453 ' connecting the positive electrode of the fourth cell module 24 and the negative electrode of the first cell module 21, and a second negative connection piece 454 ' connecting the negative electrode of the third cell module 23 and the negative electrode of the fourth cell module 24. By such a design, the first cell module 21 and the fourth cell module 24 can be connected in series, and the second cell module 22 and the third cell module 23 can be connected in series, and then connected in parallel (i.e., connected in series and then connected in parallel).
As shown in fig. 19 to 21, when the second external blade holder 52 shown in fig. 14 is inserted, the push rod 47 pushes the push portion 437 on the internal blade holder 43 to force the internal blade holder 43 to slide upward, the spring structure 432 is compressed until the positive male terminal 523 abuts against the first positive terminal 423 and the negative male terminal 524 abuts against the first negative terminal 425, and at this time, the internal blade holder 43 slides to the second position (i.e., the middle position of the electrode blade holder 41), the female terminal assembly 42 is electrically connected to the second connecting assembly 45', so that the connection manner of connecting the first cell module 21 and the fourth cell module 24 in series, connecting the second cell module 22 and the third cell module 23 in series, and then connecting them in parallel is realized. According to the principle of 'parallel voltage division and series current division', the second voltage value output by the battery pack is also equal to the sum of rated output voltages of the two battery cell modules, namely U-U1+u4＝u2+u3＝“2n”V。
As shown in fig. 22, the third external patch bay 53 includes a main body 531 and a male terminal 532 plugged into the main body 531, and the male terminal 532 includes a positive male terminal 533 and a negative male terminal 534, where the positive male terminal 533 is used for being abutted with the first positive terminal 423, and the negative male terminal 534 is used for being abutted with the first negative terminal 425, so as to realize electrical conduction between the battery pack female terminal assembly 42 and the male terminal 532 of the third external patch bay 53, and realize transmission of current and voltage.
Unlike the second outer blade holder 52 shown in fig. 14: the body 531 of the third outer insert seat 53 is also provided with a push rod 47 ', and the length of the push rod 47' is greater than that of the push rod 47.
As shown in fig. 23 to 25, when the third external patch socket 53 is inserted, the push rod 47' pushes the push portion 437 on the internal patch socket 43 to force the internal patch socket 43 to slide upward, the spring structure 432 is compressed until the male positive terminal 533 is abutted with the first positive terminal 423 and the male negative terminal 534 is abutted with the first negative terminal 425, and at this time, the internal patch socket 43 slides to the third position (i.e., the topmost position of the electrode patch socket 41), and the female terminal assembly 42 is electrically connected to the third connection assembly 46, thereby achieving the series connection of the first cell module 21, the second cell module 22, the third cell module 23, and the fourth cell module 24. According to the principle of parallel voltage division and series current division, the third voltage value output by the battery pack is equal to the sum of rated output voltages of the four battery cell modules, namely U is equal to U1+u2+u3+u4＝“4n”V。
From the above, it can be seen that: after different external inserting sheet seats 50 are selected for use, the output of different voltages of the battery pack can be realized, so that the voltage requirements of three different electric tools are met, and the switching between the three voltages is quick and convenient.
The battery pack of the present invention is also applicable to a charging system (not shown) including the aforementioned battery pack and a charger for charging the battery pack. When the charger is in butt joint with the battery pack for charging, the internal insert seat 43 is located at the first position, at this time, the first battery cell module 21, the second battery cell module 22, the third battery cell module 23 and the fourth battery cell module 24 are connected in parallel, the charging voltage output by the charger is equal to the rated output voltage of a single battery cell module, the charging voltage is low voltage, and the battery pack is protected from high current and high voltage impact.
In summary, in the battery pack of the present invention, the first connecting assembly 44, the second connecting assembly 45, 45 'and the third connecting assembly 46 are disposed at different positions of the inner blade holder 43, so that when the inner blade holder 43 slides to the first position, the second position or the third position, the female terminal assembly 42 can be selectively connected to the first connecting assembly 44, the second connecting assembly 45, 45' or the third connecting assembly 46, thereby realizing the switching of the serial-parallel state of the battery cell modules in the battery pack, further realizing the variation of the output voltage of the battery pack, and improving the adaptability of the tool system having the battery pack.
Although the present invention has been described in detail with reference to the preferred embodiments, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted for elements thereof without departing from the spirit and scope of the present invention.
Claims (27)
1. The utility model provides a battery pack, includes the casing, accept the group battery in the casing and with group battery electric connection's terminal subassembly, the group battery includes first electric core module, second electric core module, third electric core module and fourth electric core module at least, battery pack still include with electric core module electric connection's conversion components, its characterized in that: the conversion assembly is arranged in a sliding mode, when the conversion assembly is located at a first position, the first battery cell module, the second battery cell module, the third battery cell module and the fourth battery cell module are connected in parallel, and the battery pack outputs a first voltage value; when the conversion assembly slides to a second position, the anode of the first battery cell module is connected with the anode of the second battery cell module, the cathode of the first battery cell module is connected with the cathode of the second battery cell module and then connected with the anode of the third battery cell module and the anode of the fourth battery cell module, the cathode of the third battery cell module is connected with the cathode of the fourth battery cell module, and the battery pack outputs a second voltage value; when the conversion assembly slides to a third position, the first battery cell module, the second battery cell module, the third battery cell module and the fourth battery cell module are connected in series, and the battery pack outputs a third voltage value; the first voltage value is smaller than a second voltage value, and the second voltage value is smaller than a third voltage value.
2. The battery pack according to claim 1, wherein: the conversion assembly comprises a first connection assembly, a second connection assembly and a third connection assembly, wherein the first connection assembly, the second connection assembly and the third connection assembly correspond to the terminal assembly and are arranged at intervals, when the conversion assembly is located at a first position, the terminal assembly is electrically connected with the first connection assembly, when the conversion assembly slides to a second position, the terminal assembly is electrically connected with the second connection assembly, and when the conversion assembly slides to a third position, the terminal assembly is electrically connected with the third connection assembly.
3. The battery pack according to claim 2, wherein: the first connecting assembly comprises a first positive connecting piece and a first negative connecting piece, and the first positive connecting piece is provided with four positive pins so as to be connected with the positive electrodes of the first battery cell module, the second battery cell module, the third battery cell module and the fourth battery cell module respectively; the first negative pole connecting piece is provided with four negative pole pins to be connected with the negative poles of the first battery cell module, the second battery cell module, the third battery cell module and the fourth battery cell module respectively.
4. The battery pack according to claim 2, wherein: the second connecting assembly comprises a second positive connecting piece for connecting the positive electrode of the first battery cell module with the positive electrode of the second battery cell module, a fourth connecting piece for connecting the positive electrode of the third battery cell module, the positive electrode of the fourth battery cell module, the negative electrode of the first battery cell module and the negative electrode of the second battery cell module respectively, and a second negative connecting piece for connecting the negative electrode of the third battery cell module with the negative electrode of the fourth battery cell module.
5. The battery pack according to claim 2, wherein: the third connecting assembly comprises a first connecting piece, a second connecting piece and a third connecting piece, wherein the first connecting piece is used for connecting the anode of the second battery cell module with the cathode of the first battery cell module, the second connecting piece is used for connecting the anode of the third battery cell module with the cathode of the second battery cell module, the third connecting piece is used for connecting the anode of the fourth battery cell module with the cathode of the third battery cell module, and therefore the series connection of the first battery cell module, the second battery cell module, the third battery cell module and the fourth battery cell module is achieved.
6. The battery pack according to claim 2, wherein: the conversion assembly comprises an electrode inserting sheet seat and an inner inserting sheet seat, the terminal assembly and the inner inserting sheet seat are all contained in the electrode inserting sheet seat, and the first connecting assembly, the second connecting assembly and the third connecting assembly are all integrally formed in the inner inserting sheet seat.
7. The battery pack according to claim 6, wherein: the inside inserted sheet seat slides and sets up, first coupling assembling, second coupling assembling and third coupling assembling follow the slip direction interval of inside inserted sheet seat sets up.
8. The battery pack according to claim 7, wherein: the conversion assembly further comprises a pushing portion for pushing the inner insert seat to slide, the third connecting assembly is closer to the pushing portion than the second connecting assembly, and the first connecting assembly is farther away from the pushing portion than the second connecting assembly.
9. The battery pack according to claim 7, wherein: the inner insert seat comprises a base body and a spring structure abutted against the base body, the first connecting assembly, the second connecting assembly and the third connecting assembly are integrally formed with the base body, and the spring structure is compressed or released when the inner insert seat slides, so that the terminal assembly is connected among the first connecting assembly, the second connecting assembly and the third connecting assembly in a switching mode.
10. The battery pack according to claim 9, wherein: the electrode inserting sheet seat is provided with a containing cavity, the terminal assembly and the inner inserting sheet seat are both contained in the containing cavity, the base body is provided with a sliding rail protruding towards one side of the electrode inserting sheet seat, a through groove is correspondingly formed in the electrode inserting sheet seat, and the sliding rail is contained in the through groove so as to guide the inner inserting sheet seat to slide in the electrode inserting sheet seat.
11. The utility model provides a battery pack, includes the casing, accept the group battery in the casing and with group battery electric connection's terminal subassembly, the group battery includes first electric core module, second electric core module, third electric core module and fourth electric core module at least, battery pack still include with electric core module electric connection's conversion components, its characterized in that: the conversion assembly is arranged in a sliding mode, when the conversion assembly is located at a first position, the first battery cell module, the second battery cell module, the third battery cell module and the fourth battery cell module are connected in parallel, and the battery pack outputs a first voltage value; when the conversion assembly slides to a second position, the positive electrode of the first battery cell module is connected with the positive electrode of the second battery cell module, the negative electrode of the first battery cell module is connected with the positive electrode of the fourth battery cell module, the negative electrode of the second battery cell module is connected with the positive electrode of the third battery cell module, the negative electrode of the third battery cell module is connected with the negative electrode of the fourth battery cell module, and the battery pack outputs a second voltage value; when the conversion assembly slides to a third position, the first battery cell module, the second battery cell module, the third battery cell module and the fourth battery cell module are connected in series, and the battery pack outputs a third voltage value; the first voltage value is smaller than a second voltage value, and the second voltage value is smaller than a third voltage value.
12. The battery pack according to claim 11, wherein: the conversion assembly comprises a first connection assembly, a second connection assembly and a third connection assembly, wherein the first connection assembly, the second connection assembly and the third connection assembly correspond to the terminal assembly and are arranged at intervals, when the conversion assembly is located at a first position, the terminal assembly is electrically connected with the first connection assembly, when the conversion assembly slides to a second position, the terminal assembly is electrically connected with the second connection assembly, and when the conversion assembly slides to a third position, the terminal assembly is electrically connected with the third connection assembly.
13. The battery pack according to claim 12, wherein: the first connecting assembly comprises a first positive connecting piece and a first negative connecting piece, and the first positive connecting piece is provided with four positive pins so as to be connected with the positive electrodes of the first battery cell module, the second battery cell module, the third battery cell module and the fourth battery cell module respectively; the first negative pole connecting piece is provided with four negative pole pins to be connected with the negative poles of the first battery cell module, the second battery cell module, the third battery cell module and the fourth battery cell module respectively.
14. The battery pack according to claim 12, wherein: the second connecting assembly comprises a second positive connecting piece which connects the positive electrode of the first battery cell module with the positive electrode of the second battery cell module, a fifth connecting piece which connects the positive electrode of the third battery cell module with the negative electrode of the second battery cell module, a sixth connecting piece which connects the positive electrode of the fourth battery cell module with the negative electrode of the first battery cell module, and a second negative connecting piece which connects the negative electrode of the third battery cell module with the negative electrode of the fourth battery cell module.
15. The battery pack according to claim 12, wherein: the third connecting assembly comprises a first connecting piece, a second connecting piece and a third connecting piece, wherein the first connecting piece is used for connecting the anode of the second battery cell module with the cathode of the first battery cell module, the second connecting piece is used for connecting the anode of the third battery cell module with the cathode of the second battery cell module, the third connecting piece is used for connecting the anode of the fourth battery cell module with the cathode of the third battery cell module, and therefore the series connection of the first battery cell module, the second battery cell module, the third battery cell module and the fourth battery cell module is achieved.
16. The battery pack according to claim 12, wherein: the conversion assembly comprises an electrode inserting sheet seat and an inner inserting sheet seat, the terminal assembly and the inner inserting sheet seat are all contained in the electrode inserting sheet seat, and the first connecting assembly, the second connecting assembly and the third connecting assembly are all integrally formed in the inner inserting sheet seat.
17. The battery pack of claim 16, wherein: the inside inserted sheet seat slides and sets up, first coupling assembling, second coupling assembling and third coupling assembling follow the slip direction interval of inside inserted sheet seat sets up.
18. The battery pack according to claim 17, wherein: the conversion assembly further comprises a pushing portion for pushing the inner insert seat to slide, the third connecting assembly is closer to the pushing portion than the second connecting assembly, and the first connecting assembly is farther away from the pushing portion than the second connecting assembly.
19. The battery pack according to claim 17, wherein: the inner insert seat comprises a base body and a spring structure abutted against the base body, the first connecting assembly, the second connecting assembly and the third connecting assembly are integrally formed with the base body, and the spring structure is compressed or released when the inner insert seat slides, so that the terminal assembly is connected among the first connecting assembly, the second connecting assembly and the third connecting assembly in a switching mode.
20. The battery pack of claim 19, wherein: the electrode inserting sheet seat is provided with a containing cavity, the terminal assembly and the inner inserting sheet seat are both contained in the containing cavity, the base body is provided with a sliding rail protruding towards one side of the electrode inserting sheet seat, a through groove is correspondingly formed in the electrode inserting sheet seat, and the sliding rail is contained in the through groove so as to guide the inner inserting sheet seat to slide in the electrode inserting sheet seat.
21. A tool system, comprising:
the battery pack comprises a shell, a battery pack accommodated in the shell, and a terminal assembly and a conversion assembly which are electrically connected with the battery pack, wherein the conversion assembly is arranged in a sliding manner;
a first power tool operable at a first rated voltage, the first power tool provided with a first external blade mount;
a second power tool operable at a second voltage rating, the second power tool provided with a second external blade mount;
a third power tool operable at a third rated voltage, the third power tool provided with a third external blade mount;
when the battery pack is connected with a first external inserting piece seat of a first electric tool, the conversion assembly is located at a first position, and the battery pack outputs a first voltage value;
when the battery pack is connected with a second external inserting piece seat of a second electric tool, the conversion assembly slides to a second position, and the battery pack outputs a second voltage value;
when the battery pack is connected with a third external inserting piece seat of a third electric tool, the conversion assembly slides to a third position, and the battery pack outputs a third voltage value; the first voltage value is smaller than a second voltage value, and the second voltage value is smaller than a third voltage value.
22. The tool system of claim 21, wherein: the first voltage value is "n" V, the second voltage value is "2 n" V, and the third voltage value is "4 n" V.
23. The tool system of claim 21, wherein: the conversion assembly comprises an electrode inserting sheet seat and an inner inserting sheet seat, the terminal assembly and the inner inserting sheet seat are contained in the electrode inserting sheet seat, and the inner inserting sheet seat is arranged in a sliding mode.
24. The tool system of claim 23, wherein: the electrode insert seat is provided with a containing cavity, the terminal assembly and the inner insert seat are both contained in the containing cavity, the inner insert seat is provided with a sliding rail protruding towards one side of the electrode insert seat, the electrode insert seat is correspondingly provided with a through groove, and the sliding rail is contained in the through groove so as to guide the inner insert seat to slide in the electrode insert seat.
25. The tool system of claim 23, wherein: the conversion assembly further comprises a push rod used for pushing the inner inserting piece seat to slide, and the push rod and the outer inserting piece seat are integrally formed.
26. The tool system of claim 25, wherein: the length of the push rod on the first external inserting piece seat is smaller than that of the push rod on the second external inserting piece seat, and the length of the push rod on the second external inserting piece seat is smaller than that of the push rod on the third external inserting piece seat.
27. An electrical charging system, comprising:
the battery pack comprises a shell, a battery pack accommodated in the shell, a terminal assembly and a conversion assembly, wherein the terminal assembly and the conversion assembly are electrically connected with the battery pack, the battery pack at least comprises a first battery cell module, a second battery cell module, a third battery cell module and a fourth battery cell module, the conversion assembly is arranged in a sliding mode, and when the conversion assembly is at a first position, the battery pack outputs a first voltage value; when the conversion assembly slides to a second position, the battery pack outputs a second voltage value; when the conversion assembly slides to a third position, the battery pack outputs a third voltage value; the first voltage value is smaller than a second voltage value, and the second voltage value is smaller than a third voltage value;
the charger is used for charging the battery pack, when the charger is in butt joint with the battery pack for charging, the conversion assembly is located at a first position, and the first battery cell module, the second battery cell module, the third battery cell module and the fourth battery cell module are connected in parallel.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010771291.XA CN111816818A (en) | 2020-08-04 | 2020-08-04 | Battery pack, tool system and charging system |
| PCT/CN2021/110243 WO2022028399A1 (en) | 2020-08-04 | 2021-08-03 | Multi-voltage battery pack, electric tool system, and charging system |
| US18/005,063 US20230261248A1 (en) | 2020-08-04 | 2021-08-03 | Multi-voltage Battery Pack, Power Tool System and Charging System |
| EP21853485.7A EP4195390A1 (en) | 2020-08-04 | 2021-08-03 | Multi-voltage battery pack, electric tool system, and charging system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010771291.XA CN111816818A (en) | 2020-08-04 | 2020-08-04 | Battery pack, tool system and charging system |
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| Publication Number | Publication Date |
|---|---|
| CN111816818A true CN111816818A (en) | 2020-10-23 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010771291.XA Pending CN111816818A (en) | 2020-08-04 | 2020-08-04 | Battery pack, tool system and charging system |
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| Country | Link |
|---|---|
| CN (1) | CN111816818A (en) |
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